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Peptidic Monodisperse PEG "Comb" as Multifunctional "Add-On" Module for Imaging-Traceable and Thermo-Responsive
Junfei Zhu1, Huaibin Zhang1,2, Kexin Chen3
1Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals, School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, China.
Advanced Healthcare Materials
|December 19, 2019
Summary
A novel peptidic M-PEG "comb" enables dual-imaging traceable, thermo-responsive liposomal drug delivery for cancer therapy. This smart add-on module enhances tumor accumulation and therapeutic efficacy with reduced toxicity.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Theranostics
Background:
- Monodisperse polyethylene glycol-modified (M-PEGylated) biomaterials offer precise structure, biocompatibility, and tunable properties.
- Developing controllable and convenient "smart" drug delivery systems is crucial for advanced therapies.
Purpose of the Study:
- To create a peptidic M-PEG "comb" as a traceable and thermo-responsive module for liposomal theranostics in cancer therapy.
- To evaluate its dual-imaging (19F MRI and fluorescence) capabilities and thermo-responsive drug release.
Main Methods:
- Synthesis of a peptidic M-PEG "comb" with fluorinated L-lysine and a fluorescent N-terminus.
- Self-assembly of the comb onto doxorubicin-loaded liposomes for M-PEGylation.
- In vivo evaluation in a rodent xenograft model of human liver cancer (HepG2 cells).
Main Results:
- The M-PEGylated liposomes demonstrated long in vivo half-life, low toxicity, and significant tumor accumulation.
- Effective "hot spot" 19F MRI signal and therapeutic efficacy were observed.
- The module facilitated thermo-responsive drug release and dual-imaging based drug tracking.
Conclusions:
- The peptidic M-PEG "comb" acts as a versatile add-on for creating smart theranostics.
- It enables precise control over drug delivery, diagnosis, and therapy with tunable properties.
